Furnace construction.



M. H. DETRICK. FURNACE CONSTRUCTION.

APPLICATION FILED FEB. 19, 1916.

Patented Nov. 5, 1918.

Irvnonr L? nnrnrcn, or cnrcaeo, ILLINOIS, assrenon no in. II. nn'rnrcn ea, or

1 cnrcnoo, IitLIn'oIs, a conroa'rron or ILLINOIS.

1i efile,

To all whom it may concern:

.Be itknown that l, Mvnon H. Dn'rnrcn, a citizen of the United States, residing at the city of Chicago, in the county of (look and State of Illinois, have invented certain new and useful Improvements in Furnace 'Construction, of which the following is a specification. 1

My invention relates to the construction of furnaces which are used for the purpose of heating steam boilers and the lilre. The object thereof is to provide a simple and easily assembled structure by which the fire brick may be. supported, which shall be thoroughly ventilated in the inclosed parts, thereby. preventing them from being .softened and weakened by heat, and in the construction of which advantage may be taken of certain commercial sha es, thereby greatly cheapening and simplifying the construction. it also provide means by which the fire brick may be securely. suspended in such a manner that the heat of the "furnace and the combustion gases will not be liable to escape and attack the suspending devices, and by which any renewals .lib

of the parts may be easily and quickly made without materially disturbing other parts of the structure.-

The principlesof my invention are illustrated in the drawings, in which- Figure l is a side elevation of a portion of a suspension girder, and adjuncts, embodying my invention; the adjacent Wall of the furnace, the arch bar and a fire brick carried by said bar being shown in section;

Fig. 2 is a top View of said girder and associated parts;

hig. 3 is a cross section of Fig. Q on the line3-3;

Fig. tshows side and end views of the girder spreader.

Further describing my invention With reference to the drawings: 1 is a vertical section of a furnace side wall. 2-2 are channel. bars placed back to back, and spaced from each, other by spreader or spacing blocks 3, having the extensions 4-, which rest upon the upper flanges 5 -5 of the channel bars. The upper part of said spreader, includin the extensions 4, may form a head the 6, provi ed with a notch or groove 7. *Outside the said channel bars are secured plates 9, so that they rest against the ed es of the upper flanges 5, and ofthe lower anges 10.

specification of Letters Patent.

FURNACE CUNSTJRIUCTIUN.

Patented ltlov a, rail.

Application and February 19, rain. Serial no. vases.

The said plates are wider than the channel bars and the projecting edges are perforated to take the bolts 11 and 12 outside of the channel bars. The said bolts are preferably arranged above and below the channel bars in pairs "corresponding to each of the spreaders, and the upper bolt 11 may rest in the groove 7, which runs longitudinally of the spreader block head, thereby holding it firmly and accurately in position. When thus assembled and the bolts are tightened the whole will form a compound girder of greabstrength in comparison to its weight. The spaces in the two sections of the girder which are inclosed by the webs and flanges of the channel bars and the plates secured outside them, provide lines through which currents of air may be caused to circulate. Complete cooling and ventilation of the girders are thus provided. The free ends of the girder section may be open on both sides of the furnace producing a freecurrent of air through both tlues, but where for any reason the ends atone side of the furnace are inclosed, T provide a box l5, preferably of cast iron, having a chamber 16, from one side of which extend the hollow projections 17, which are adapted to be. received within the ventilating fines of the girders as described. A complete circulation of air may thus be provided through one section of the girder to said chamber and out of the same through the other section of the girder. Suspension hangers for each of the arch bars, are provided. Une of these hangers is indicated at 20. Its upper end is provided with a loop 21 through which extends a transverse pin 23 which bears upon the upper portions of the channel bars 2. The

lower end of the hanger is provided with Win cars 24 in the space between which the upper flange 25 of the arch bar is received and therein held in place by a bolt 26. illt will be seen that the hangers may be spaced as desired at proper intervals to support the arch bars and to place the rows of bricks suspended thereby in proper position to form the fire briclr arch. The pendent load bein in perfect balance, the hangers, arch bar an brick have capacity for limited longitudinal movement independently of the girder, or can be shifted longitudinally of the gir er in a manner to combine the advantages of adjustability and flexibility of parts.

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arranged in spaced relation to each other ha-vlng longitudinallyextendlng flanges on their outer sides, cover plates secured against sa1d flanges to form air flues throughout the1r length, and means at one end of the I girder connecting the said flues.

2. In a furnace, a girder comprising bars arranged in spaced relation to each other having longitudinally extending flanges on their outer sides, cover plates secured against said flanges to form air flues throughout 4 their length, and a common air chamber at one end of the girder connecting the said flues. K

ing a plurality of channel bars placed back to back, means for securing the channel bars in spaced relation, cover plates secured outside the channel bar flanges to form airflues throughout their length, and means at one Ielnd of the girder for connecting the said ues. I

4:- In a heating furnace, a. girder comprising a plurality of channel bars placed back to back, means for securing the channel bars in spaced relation, cover plates secured outside the channel bar flanges to form air flues throughout their length and an air chamber at one end of said girder communicating with said flues.

5. In a heating furnace, a girder comprising a plurality of channel bars placed back to back, a spacing block between the channel bars, cover plates outside the channel bar flanges and projecting therebeyond, and bolts engaging the projecting edges of said plates and clamping the same in position on said flanges.

6. In a heating furnace, at girder comprising a Iplurality of channel bars placed back to bac a T-shaped spacing block having the body thereof between the channel bars and the lateral projections resting on the tops thereof, cover plates outside the channel bar flanges and projecting therebeyond, and bolts engaging the projecting edges of said plates and clamp ng the same on said flanges.

in position on said flanges, 0

7. In a heating furnace, a girder comprising a plurality of channel bars placed back to back, T-shaped spacing blocks having the bodies thereof between the channel bars and the lateral projections resting in the tops thereof, cover plates outside the channel bar flanges and projecting therebeyond, and paired bolts engaging the projecting edges of said plates and clamping the same in position on said flanges, the upper bolts of each pair also engaging the heads of the spacing blocks.

8. In a heating furnace; a girder comprising a plurality of channel bars secured back to back in spaced relation, cover plates outside the channel bar flanges, means for securing said plates in contact with said flanges, pins resting on said channel bars, an arch bar hanger dependent therefrom between said channel bars, an arch bar pivoted to said hanger and extending transversely 'of and below the channel bars, said arch bar being longitudinally flanged, and a series of fire bricks provided with undercut grooves engaged by the flanges of the arch bar, said bricks being thus supported in close relation to each other throughout the length of the arch bar.

9. In a heating furnace; a girder comprising a plurality of channel bars placed back to back, a spacing block between the channel bars, cover plates outside the channel bar flanges and projecting therebeyond, bolts engaging the projecting edges of said plates and clamping the same in position on said flanges, pins resting on said channel bars, and an arch bar hanger dependent therefrom between said channel bars.

10. In a heating furnace; the combination with a plurality of girders'each comprlsing two channel bars secured back to back in spaced relation, cover plates outside the channel bar flanges and projecting therebeyond, and bolts engaging the projecting edges of said plates and clamping the same pins restlng on the channel bars, hangers dependent from said pins, and arch bars secured to said hangers below the girders.

In witness whereof, I have hereunto sub-- scribed my name this 15th day of February, 1916, in the presence of two subscribing witnesses.

MYRON I'I. DETRICK. Witnesses:

C. K. CHAMBERLAIN, R. S. PHILLIPS. 

